The Fellowship traversed the Mines of Moria, once excavated by dwarves to obtain Mithril. Aragorn admitted that the place has an evil reputation. And evil did startle them: orcs and Balrog ambushed overnight.
Their following destination was Lothlórien, a magnificent forest that is inhabited by elves. There, they were invulnerable.
Hitherto, I have noticed intelligible foils between the nature-loving and the nature-deceiving. Tom Bombadil, the hobbits and the elves treasure and preserve nature; Sauron, the orcs and the dwarves utilize nature through dreadful ravages. Here, there is an explicit distinction between harmony and supremacy within the connections between mortals and nature, which is evident in the dawn of the 20th century.
Tolkien himself felt hostile towards industrialization.
He set out to convey that the rise of the machines was based on greed. Natural resources were being demolished, and earth would be contaminated. As a Catholic, Tolkien would acknowledge that God’s artistic masterpiece began with a garden, and should not be repainted into a wasteland (perhaps this is the reason why Galadriel distinguished her gift to Sam not as a shield—nor a weapon—but as a ‘blessing’). This is the core of Tolkien’s view. Hence, industrialization is dishonorable to God, and subjectively speaking, evil.
The dwarves did not quarry for the sake of evil, but greed. However, it nevertheless generates evil. Tolkien would consider the greed to steal natural resources, as personal fortunes, evil. Industrialization is exclusive and rewarding. But, it is suicidal. As a child, Tolkien had never seen airborne transportations; as an adult, he saw thousands of pilots bombarding the masses and habitats of their own race and home planet.
Therefore, contrasting distinctions within the races in Middle-Earth were made to emphasize the utopian qualities of the nature-loving hobbits and elves to appoint them as ideal human beings.